Test Tube Heater
Precision 4-vial thermal reactor for COD analysis with programmable temperature control (20-180°C) and heating periods up to 120 minutes.
Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- Model fit
- Configured during quote
- SKU family
- CS-LH-COD008
- Sizing
- 2362.2 x 492.13 x 0.63 cm
- Ordering
- Online checkout and quote request available
- Category
- COD & BOD Testing
- Build notes
- Confirm accessories, station layout, and support needs before purchase
The COD Test Tube Heater (CS-LH-COD008) is a precision thermal reactor designed for chemical oxygen demand (COD) analysis and general sample digestion procedures. This compact benchtop unit accommodates up to four standard test tubes (≤16mm diameter) with programmable temperature control from 20-180°C and heating periods from 0-120 minutes, providing the controlled thermal environment required for standardized COD digestion protocols.
The reactor employs direct heating technology with ±3°C temperature accuracy at 25°C, ensuring reproducible thermal conditions for quantitative chemical analysis. The 10-15 minute warm-up time and precise temperature regulation make this instrument suitable for routine analytical workflows in environmental laboratories, wastewater treatment facilities, and research institutions conducting water quality assessments.
How It Works
The COD test tube heater operates on the principle of controlled thermal digestion, where organic compounds in aqueous samples are oxidized under elevated temperature conditions in the presence of a strong oxidizing agent (typically potassium dichromate in sulfuric acid). The heating block provides uniform thermal energy transfer to four sample vials simultaneously, maintaining precise temperature control throughout the digestion period.
During the COD digestion process, the controlled heating environment facilitates the complete oxidation of organic matter to carbon dioxide and water. The amount of oxidizing agent consumed is proportional to the organic content of the sample, which can then be quantified through spectrophotometric measurement of the dichromate reduction or titrimetric determination of remaining oxidant. The programmable temperature and time controls ensure reproducible digestion conditions required for accurate quantitative analysis.
Features & Benefits
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Industrial Hygiene
- Pharmaceutical QC
Product name
- cod digester test tube heater
Warm-up Time
- 10-15 minutes, depending on selected temperature
Heating period
- 0-120mins
Environment temperature
- (0-40)â
Environment relative humidity
- <=85%
Automation Level
- semi-automated
Brand
- ConductScience
Temperature Range
- 20-180â
Accuracy
- ±3 â(@ 25â)
Capacity
- 4 vials (the diameter of vial should be not more than 16mm.)
Power/Voltage
- DC 12V/10A
Dimensions
- 110*170*135 mm
Weight
- 5619.14 kg
Dimensions
- L: 2362.2 mm
- W: 492.13 mm
- H: 0.63 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Sample Capacity | 4 vials simultaneously (≤16mm diameter) | Entry-level models often accommodate 1-2 vials | Higher sample throughput enables batch processing of samples and duplicates for improved analytical efficiency. |
| Temperature Range | 20-180°C with ±3°C accuracy | Basic heating blocks may offer limited temperature ranges or lower accuracy | Wide temperature range accommodates various digestion protocols beyond standard COD methods. |
| Heating Period Control | Programmable 0-120 minute timing | Manual timing or fixed heating periods in simpler units | Automated timing control ensures consistent digestion periods and reduces operator intervention. |
| Warm-up Time | 10-15 minutes to target temperature | Larger heating blocks may require 20-30 minutes | Faster thermal equilibration reduces wait time between analytical runs. |
The CS-LH-COD008 offers efficient 4-vial capacity with precise temperature control and programmable timing in a compact laboratory footprint. The ±3°C accuracy and wide temperature range support standardized analytical protocols while maintaining practical throughput for routine analysis.
Practical Tips
Verify temperature accuracy monthly using a certified reference thermometer placed in a water-filled test tube.
Why: Temperature accuracy directly affects digestion efficiency and analytical reproducibility.
Clean the heating block wells regularly with mild detergent to remove chemical residues that could affect heat transfer.
Why: Chemical buildup can create thermal barriers leading to temperature inconsistencies.
Allow full warm-up time before starting analysis and use the same vial positions for comparable samples.
Why: Thermal equilibrium and consistent positioning minimize analytical variability between samples.
Always use appropriate eye and hand protection when handling hot test tubes and corrosive COD reagents.
Why: Combined thermal and chemical hazards require multiple levels of personal protection.
Run blanks and standards in the same heating cycle as unknown samples to account for any thermal variations.
Why: Simultaneous processing ensures all samples experience identical thermal conditions.
If temperature readings fluctuate, check that ambient conditions remain within 0-40°C and humidity ≤85%.
Why: Environmental conditions outside specifications can affect temperature sensor accuracy and thermal stability.
Setup Guide
What’s in the Box
- COD Test Tube Heater main unit
- DC 12V/10A power adapter
- User manual and operating instructions (typical)
- Thermal calibration certificate (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support available for operational guidance and troubleshooting assistance.
Compliance
What is the temperature uniformity across all four heating positions?
The unit provides ±3°C temperature accuracy at 25°C ambient conditions. For specific uniformity data across heating positions, consult the product datasheet.
Can this heater accommodate microtubes or only standard test tubes?
The heater is designed for test tubes with maximum diameter of 16mm. Smaller diameter tubes like microtubes can be accommodated but may require adapters for optimal thermal contact.
How does the heating rate compare to traditional hot plates for COD analysis?
The dedicated heating block design provides more uniform and controlled heating compared to hot plates, with 10-15 minute warm-up time depending on target temperature.
Is there automatic temperature ramping or only set-point control?
The unit provides programmable temperature and time settings. For specific ramping capabilities and control algorithms, consult the detailed operating manual.
What maintenance is required for long-term temperature accuracy?
Regular calibration verification using certified reference thermometers is recommended. The heating block should be kept clean and free of chemical residues that could affect thermal transfer.
Can the unit operate continuously for extended periods?
The unit is designed for laboratory use with appropriate duty cycles. For continuous operation requirements exceeding 8 hours, verify thermal stability specifications with the manufacturer.
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Accessories
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